Machine for shanking soles and skiving leather.



N0. 687,684. Patented Nov. 26, 190i. L. GODDU. MACHINE FOR SHANKING SOLES AND SKIVING LEATHER.

(Application filed Jan. 11, 1899.)

2 Sheets-$heat II.

(No Model.)

UNITED STATES PATENT EETGE.

LOUIS GODDU, OF WINCHESTER, MASSACHUSETTS.

MACHINE FOR SHANKING SOLES ANDSKIVING LEATHER.

SPECIFICATION forming part of Letters Patent No. 6873684, dated November 26, 1901. Application filed January 11', 1899. Serial No. 701,836. (No model.)

To QZZ whom it may concern.-

Be it known that I, LOUIS GODDU, of Winchester, county of Middlesex, State of Massachusetts, have inventedan Improvement in Machines for Shanking Soles and Skiving Leather, of which the following description, in connection with the accompanying drawings, is a specification, like characters on the drawings representing like parts.

The present invention relates to machines for skiving leather, and more particularly to machines for skiving the soles of boots and shoes.

It is now customary in manufacturing welted boots and shoes to reduce the thickness of the outsoles along the shank portions thereof by removing from the flesh side of the soles along each margin of the shank a substantial arc-shaped skiving, whereby when the sole is attached to the boot or shoe the thin shank so much desired in fine boots and shoes will be secured.

The object of the present invention is to produce a machine of simple form and arrangement by means of which the shanks of the soles of boots and shoes may be quickly and accurately skived, as above described.

To the above end the present invention consists of the devices and combinations of devices which will be hereinafter described and claimed.

'The machine forming the present invention is shown in the accompanying drawings, in which- Figure 1 shows the same in side elevation looking at the. left, with the lower part of the standard omitted. Fig. 2 shows a front elevation of the machine as shown in Fig. 1. Fig. 3 shows a longitudinal section on the line a: as, Fig. 1; and Fig. 4 is a partial top or plan'view showing the sole in position and illustrating the operation of the machine, the feed and presser roll being broken away for clearness.

Similar characters of reference will be employed to designate corresponding parts.

In the drawings, A represents the head of the machine of a size and shape to support the operative parts, .which head is in the illustrated form of the'invention provided with a depending shank or stem A, which is received in a bearing formed in the upper split end of a standard A in which it is clamped by a bolt A all of which will be clear from an inspection of the drawings.

In the head A is formed a longitudinallydisposed bearing, in which is supported the driving-shaft A which at one end supports the bed-roll C and at its opposite end the combined hand-wheel and pulley D, which supports on a sleeve D a loose pulley D the whole being secured on the shaft A by means of the washer D and nut D The bed-roll C may be of any usual or preferred form; but for the purposes to be hereinafter described it is preferably made somewhat tapering in form and provided with a frictional surface of leather or other similar material. The roll of the drawings comprises a disk a having a tubular sleeve a, upon which is fitted and tightly clamped a series of disks of leather or other similar material 00, the peripheries of which are trimmed off to produce the tapering form,as clearly shown. These disks a are held between the disk a and a clamping-disk a the whole being securely fastened to the reduced end of the shaft A by a nut a. If desired, the disks (1 and a may be fastened together by means of bolts or rivets a, which pass through and secure the disks a In a trough-shaped recess at of the head A there is pivoted at b a block b in which is formed a longitudinal bearing for the shaft b which at its forward end carries a presserroll 0, which is preferably formed of metal and which is provided with concentric rows of annular teeth or serrations 0 which cooperate with the bed-roll in feeding the sole to the skiving-knife. The roll 0 is held on the forward end of the shaft 19 by means of a nut c or in any other suitable manner.

It is designed that the roll 0 be rotated simultaneously with the roll C to feed the work,

and for this purpose the shaft A is provided with a gear I), which meshes with and drives a pinion b on the shaft 12 The block b is designed to rise and fall to accommodate for the inequalities in the thickness of the material which passes between the rolls a and O and for the purpose of yieldingly forcing the roll a in contact with the material, so as to cause the rolls to grip and feed said material along, the block b is acted upon by a spring 17 which is received in a tubular bearing b secured to the head A by screws 15 which in its upper end carries a screw b against which the upper end of the spring 5 bears and by means of which the tension thereof may be regulated;

From the foregoing it will be observed that a rotation of the shaft A will impart a rotation to the shaft 19 in the opposite direction, thus causing the rolls a and G to grip and feed the sole in the direction of the arrow, (shown in Fig. 4,) and as it is fed along it will come in contact with the knife e, which will remove from the flesh surface thereof an arc-shaped skiving, as clearly shown in the drawings. This knife, as shown, consists of a plate of steel, the forward edge of which is sharpened, and it is positioned in the machine with its cutting edge in line with the bite of the rolls 0 and C. The knife is secured, by means of a bolt e in the dovetail groove of a split knife-block 6 along which the knife may be adjusted as it is worn away by grinding. The block 6 is provided with a cylindrical stem f, which is received in a split bearing f, carried by an arm f of a bell-crank lever which is fulcrumed at f to the side of the head A the upwardly-extending arm f of the bell-crank lever being provided with inwardly-extending projections f which carry adjusting-screws 2 and 3, which are arranged to engage the opposite sides of a lug or projection f formed on the head A The shankfof the knife-block e is clamped in the bearingf by means of a screw or bolt f From the foregoing arrangement it will be observed that the knife may be adjusted longitudinally in the knife-block e as said knife wears away, that by turning the knife-block shank fin its bearing the cutting edge may with a tapering bed-roll, and a substantially be adjusted angularly with relation to the bite of the rolls 0 and O, and thus determine the angularity of the bevel produced, and

that by adjusting the lever f f"' about its fulcrumf by means of the screws 2 and 3 said knife may be raised and lowered with relation to the bite of the rolls 0 and O, and

thus determine the depth of the skiving re moved from the sole.

Cooperating with the knife and feed-rolls is an edge-gage, against which the edge of the sole bears and by which it is guided and positioned as it passesv between the rolls and against the knife, said gage being shown at d and being preferably formed by rounding off the forward ends of the walls of the head A which form the trough-shaped recess, as shown clearly in Figs. 1 and 2 and by dotted lines in Fig. 4.

It will be noted that by the construction of se zes 1 knife-holder just described the knife may be quickly adjusted and positively held in its adjusted position. It will be further noted that by forming the bed-roll with a substantially tapering surface and the presser-roll with a substantially cylindrical surface, whereby these surfaces diverge in the direction of the axes of the rolls, the sole will be permitted to drop down, as it were, at its outer edge and assume a slightly-inclined position, which greatly facilitates the cutting of the desired arc-shaped skivin g from the shank,and is posi= tively prevented from rising and inclining in the opposite direction, while along the inner ends of the rolls 0 and O the sole will be positively gripped and fed and held up against the curved guide d, which as the curved and ir= regular edge of the sole passes along will act to turn the sole while gripped by the rolls a and C, and thus cause the knife to properly skive the shank, as shown clearly in Fig. 4.

It is thought that the mode of operation has been sufficiently described in connection with the foregoing description of the form and arrangement of the several parts and that a further description thereof will be deemed unnecessary.

Having described the construction of my invention and its mode of operation, I claim as new and desire to protect by Letters Patent of the United States- 1. In a skiving machine, the combination with a bed-roll and a presser-roll, the surfaces of which diverge in the direction of the axes of the rolls, one of said rolls being tapering and the other substantially cylindrical, of

. a skiving-knife havinga cutting edge located 1' in line with the bite of the rolls and a gage or hearing for the edge of the material to be skived, substantially as described.

2. In a skiving-machine, the combination cylindrical presser-roll, the surfaces of which diverge in the direction of the axes of the rolls, of a rounded bearing-surface or edgegage and a skiving-knife having its cutting edge located in line with the bite of the rolls, substantially as described.

3. In a skiving-machine, the combination with a bed-roll and a presser-roll, the surfaces of which diverge in the direction of the axes of the rolls, of a skiving-knife located in line with the bite of the rolls, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

LOUIS GODDU.

Witnesses:

Gno. W. GREGORY, M. A. DUNN.

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